Tag: CentOS

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New World Community Grid Node

I started volunteering some of my extra computers’ idle time for the World Community Grid in December, 2013.  Unfortunately, the machine in question, a used computer I’d bought about five years earlier and, after having been used as a desktop for a few years, had been converted to being a server under CentOS, died from a “thermal event” nine months later.  It had completed 713 results and earned 419,591 points.

In 2016, I found a P4 3.4GHz machine, installed CentOS 7 on it, and then the BOINC infrastructure.  I assigned it to the World Community Grid and 100% of its capacity to the project.  From when it began in September, 2016 to today, it has completed 4,540 results, and earned 2,568,590 points.

In 2017, I finally converted my old netbook (32 bit atom processor) to CentOS 6 and did the same thing.  From when it began in April until today, it has completed 261 results, and earned 133,073 points.  (What a difference in capacity that 3.4GHz 64 bit has as compared to 1.6GHz 32 bit!)

Over the past few months, I have been collecting up a number of old machines which have come my way, including some IBM ThinkCentres from the Windows Vista era.  So far, my brother and I haven’t been able to get them running properly, and we will probably end up using them for spare parts.

In the meantime, we acquired two more computers.  My brother wanted / needed a replacement computer for his aging media server, an old reclaimed IBM ThinkCentre I’d gotten for him a few years ago.  I, in the meantime, wanted to add another node to the World Community Grid (of course, working at 100% of capacity.)

I chose CentOS 7 for this build, like I did for my other nodes, for what I consider to be the obvious reason that I want to pretty much forget about the computers and just relish in the numbers on the World Community Grid website — I don’t want to be re-installing every year!

The install went well enough, although it was long enough process for the base install, as compared to my laptop and desktop.  I will rule out the comparison to my laptop since the SSD and physical drive don’t compare at all.  As for the desktop and node, I’ll chalk up the difference mainly to processor speed and general architectures:  A 2015-era four core i5 running at 3.4GHZ vs a 2010 era Pentium dual-core E6500 running at 2.93GHz (no HyperThreading).

What was really long after that was the yum update after the initial install — about 650 packages!  In the process of the updates, I tried a few things like web surfing, and the gnome desktop became unstable; I ended up with a flashing text screen.  I finally rebooted, and tried to downgrade to an older kernel in GRUB, to no avail.  I tried the rescue kernel, no avail.  Under both situations, I couldn’t pull up a terminal with Alt-Ctrl-F2.  A quick check under a Fedora live environment was a waste of time, since I didn’t really know how to diagnose things; however, I was able to mount the CentOS drive.

There was some flirting with the idea of installing Fedora 27, but I don’t want the re-installation mill on this machine (or any of my other volunteer computing nodes) every year — although, seeing my brother upgrade from Fedora 25 to 27 through the GUI go as smoothly as a routine DNF upgrade is making me wonder if the point is moot.  (Note that CentOS 7, based on Fedora 19, is still using YUM, while Fedora has been using DNF since version 22.)

Finally, I restarted the install of CentOS, this time doing a minimal text install.  Things were a touch faster.  Then I did a yum update, with only about half as many packages to update.  After that, I installed the Gnome Desktop on the machine. (Here’s my archive.)

I continued with the installation of the Fedora EPEL repository (as root “wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm”, then “rpm -ivh epel-release-latest-7.noarch.rpm”).  Installing the BOINC infrastructure was easy:  As root “yum install boinc*”.

I launched the BOINC manager from one of the pull down menus, and, to my surprise, it actually worked out of the box, unlike previous installations.  Someone must have updated the packages. 🙂  I added the World Community Grid website information, and my account and password.

Voilà!  At 12:00 UTC the next morning, my machine had already submitted FIVE results, and earned 2,429 points!  And, at 00:00 UTC as I’m completing this post, a total of EIGHT results, and 4,638 points!

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malak.ca updated

Since about lat 2016, my website had problems with uptime:  It was mostly down.  In the spring of 2017, it was finally up and I did a bit of restoration work.  And then … it was down again for a few months.  (And, due to the circumstances of this downtime, my restoration work was lost.)

Finally, I transferred my website to an existing home server, and it is now living out of a computer which I believe may be as old as 2003, living under CentOS 7.x series, in my bedroom.  Having fixed a faulty telephone line (squirrels!) the line is now “not noisy” and the internet is back properly.

Main work has been:

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Hmmm … OO.o differences, Fedora, and Ubuntu

In my post I may just have that reason to get rid of Ubuntu I whined about minor differences between “stock” OpenOffice.org appearances and functions and those I used straight off the OO.o website as well as what ships with Fedora.

This blog (here’s my archive) explains a bit why: It says “Many Linux distributions ship ooo-build. … Fedora ships a modified OpenOffice.org, but Fedora does not use ooo-build.” Which means that in keeping with Fedora’s usual policy, it ships upstream versions of software with only reasonably required modifications to make it work under Fedora. When I was using CentOS, I was using the vanilla version directly from OO.o.

That explains a few things. It doesn’t necessarily justify my whining — nor all the changes Ubuntu or other distros (or even Fedora) make, but … Why mess with a good thing? 🙂

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Vino-server appears to have struck again!

Back a couple of years ago, my CentOS-4.6 system was slowing down to near unuseability. Using the Top command at a command line, there seemed to be this service listed at the top called Vino taking up a good amount of resources. My brother looked at it, researched it, and set up an hourly cron job to kill the vino-server every hour, and the problem was solved.

Back last fall, I was getting this notion, while running Ubuntu 8.04 LTS, that the system had slowed down a bit much the same way that Windows 2000 is a little slower than Win98. When I switched back to Fedora 10, I noticed the same thing. However, I never noticed a return of the infamous vino-server.

Then last week I figure it’s time to get more memory and decided to pull out my 512meg memory stick and go with it, for comparative purposes to make sure I get the right thing, to the store to get a twin for it, or a 1gig stick, in the hopes that either a gig or a 1.5 gigs would improve performance. I’m cheap and was pleased to pick up what appeared to be a nearly-new, opened box of 1gig of SDR2 667mhz for $5.

Well, I guess those of you who actually know what to do around an open computer are chuckling by now and know that my new purchase doesn’t fit in my DDR slots, the little slot in the DDR2 stick being about a millimetre or two over from the same slot in DDR memory sticks.

In the meantime I of course put my original memory stick back and notice over the past week that my computer is becoming increasingly bogged down to unuseability. During the week I found a website that seemed to make my computer freeze, but others didn’t. Today I mention the general slowness that the computer has bogged down to to my brother who looks at things and he has a flash of memory. A quick hourly cron job is set up to kill vino-server, and my computer works fine again.

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Uggghh … I need a bar of soap

I think I’m going to be sick. 🙁

I never cared for Debian and derivatives because Debian never seems organized enough to get a new release out. In all honesty I’ve never tried Debian. I hate Ubuntu, mostly because I’m very suspicious of anything with great marketing hype and hordes of fanboys to boot. (So much for my initial suspicion of the Stargate movie in 1994 and all of its over-hyping; I have long since wished I had overcome this and gone to see it in the theatres, and I do love SG1 in reruns. 🙂 )

Last week my brother and I were jumping hoops again and again to get my printer working under Centos 5.2. Last January we’d gone to a lot of trouble to get it to work under Centos 4.6 (I finally upgraded to the 5.0 series about a month ago.) No matter how many hoops we’d jump through and resolve there were still more, or another set would surface. Realize that this is a relatively new printer that must have come out at least last fall if not earlier, my brother received it as part of a “throw it in with the new laptop he bought” kind of deal. Red Hat therefore had gone through at least one update, if not two (at least 5.2 if not also 5.1) to add the appropriate drivers or move to the next HPLIP version that would support the printer. To give you an idea, Centos 5.2 comes with HPLIP 1.6.something, my printer needs at least 1.7.something, and the current version is 2.8.something.

Seems to me that commodity printers should be supported, it’s not as though a corporate situation doesn’t use printers. Though they would probably say that my line of printers is too commodity for an enterprise to be interested in, they probably want high-capacity, high-quality printers, not an inkjet meant for the consumer market.

I knew that the printer worked under ubuntu since I tried a live CD from them and it worked without saying boo. My brother was “willing” to continue trying to get it to work but was pushing hard to switch. “You can always switch back to Centos you know.”

The printer was a killer. So is getting wireless on my laptop, using a several years old (about 4 years old) pcmcia wireless card; under CentOS 4.6 I had a kernel under which it worked but any time there was a kernel upgrade I would have to switch back if I wanted to use the wireless. We hadn’t done anything yet about the wireless but had a plan.

I still haven’t gotten the wireless to work under Ubuntu but to be fair I haven’t tried yet at all.

My first reaction was that Ubuntu was the Playskool version of linux.

I also HATE the fact that the default user under Ubuntu is a defacto root user — first thing I did was get rid of the annoying sudo requirement by assigning a password to root, but it’s not of much value because so far I haven’t come across anything in Ubuntu that really requires root the way it would under ANY other linux distribution, other than the fact that it constantly asks for passwords to do anything. Also annoying is that I can’t log root into a gui to do things that way (including to REMOVE the default user from the admin ring.)

This may be the undoing of Ubuntu along the lines of the way that Windows is plagued with problems because most of the time the default user has admin rights and can install and run just about anything unless the Admin user shuts it down. The only upside is that it always asks for your password, but I expect that most windows converts would find this annoying and just mindlessly enter their password just to get on with things.

Once I got over the shock, the problem now is that the user experience, other than the administration to which I’m accustomed mostly doing under a command line instead of gui, is identical to Centos. (The main ubuntu distro desktop is gnome, as is the case for Centos.) Admittedly, the Synaptic gui package manager along with the extensive Ubuntu repo vs. the Centos repos is as good as they say, and worth the switch. And 8.04.1 is an LTS version, meaning that it’s supported for 3 years instead of having to go through the reformat treadmill every 6 months (OK, Fedora supports versions for a month after the release of the second release following, meaning about 12-13 months.)

I hope that RHEL (and hence Centos) shapes up and realizes that some people like using as a desktop, and that making it at least vaguely usable without pulling teeth and hair is as important as making it stable.

I have to go now and wash my mouth out with soap.

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New Desktop and Centos 5.2

So I’m going to the bank to deposit a trivial amount of pocket money (ok, not so trivial that it isn’t worthwhile to me in the moment; I’m discussing $50) and I decide to walk into the used laptop store before crossing the street.

I see this really cute Dell mini-tower. “Hyper-threading,” the guy tells me. Elsewhere I hear, “no good, could be a real security flaw under linux”. $100; I take out all my bills and about $40 in silver (I occasionally have way too much silver in my pockets!) and promise to come back with the remaining $10.

A cute little P4 2.8 with 512 megs and a 40gig HD, but only a CD rom. I’m happy, apparently there were a couple of duds in the lot of them he received.

Got home, and put on Centos 5.1 using the CD’s from a couple of months ago. Funny, the next day 5.2 comes out and I of course immediately upgrade, but the whole thing takes several hours to download and install!

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Trying to make a new server

So last December I find this old clunker in the garbage pile at work: base memory, CD rom, and power source. Oh, and it weighs a ton.

I decided that I wanted a server to act as my internet gateway and was too cheap to buy a router; I bought an 8 gig HD used for $10 and burned the appropriate disks. Realize that my wonderful PIII 555 is slowing down a bit, so in order to get the most out of it I decide that it should no longer have to deal with internet sniphing, attacks, pinging and so on.

The install takes just about all night. It succeeds, though, and I got to see what the “new” (now of course old) gnome desktop looks like, a glimpse of which I’d seen a couple of years before with FC5. (Shudder. Bad experience.)

And what happens?

My brother says that the HD I bought was a dud. Point final.